net: annotate ->poll() instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c
index 91e3ba2..671b907 100644
--- a/net/bluetooth/af_bluetooth.c
+++ b/net/bluetooth/af_bluetooth.c
@@ -421,7 +421,7 @@ int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg,
 }
 EXPORT_SYMBOL(bt_sock_stream_recvmsg);
 
-static inline unsigned int bt_accept_poll(struct sock *parent)
+static inline __poll_t bt_accept_poll(struct sock *parent)
 {
 	struct bt_sock *s, *n;
 	struct sock *sk;
@@ -437,11 +437,11 @@ static inline unsigned int bt_accept_poll(struct sock *parent)
 	return 0;
 }
 
-unsigned int bt_sock_poll(struct file *file, struct socket *sock,
+__poll_t bt_sock_poll(struct file *file, struct socket *sock,
 			  poll_table *wait)
 {
 	struct sock *sk = sock->sk;
-	unsigned int mask = 0;
+	__poll_t mask = 0;
 
 	BT_DBG("sock %p, sk %p", sock, sk);